The document discusses the history and purpose of the Home Energy Rating System (HERS) in California. HERS was developed in the 1990s as a standardized method for evaluating and scoring the energy efficiency of homes, with early focus on existing homes. HERS ratings can be done by compliance raters for new construction or renovations to ensure meeting code, or by whole house raters to gather detailed energy efficiency information on existing homes. The document provides contact information for the California HERS Provider CalCERTS.
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